Yeah, I've noticed the loading bar thing as well. Kinda makes you wonder how this happened after what..7 years? I don't see why they would change anything related to these functions but meh, not really a huge deal.

I'm pretty sure it has more to do with the new streaming client. You are loading extra data you didn't have from before.

Had 2 guildies with a similar issue last night, it might be coincidence, but both were tabbed out during the flight. The other 8 members of the raid that stayed ingame had no problems. Might be coincidence, but may still be good to consider as an effector?

But that's not NEW.. It's been like that since Cata... Multiple load bars only occured since v5.1, and everything have been downloaded since day 1...
Besides, stuff not downloaded, is simply not displayed, and the green circle is on the screen, and then *POOF* the graphics appear in front of you... Saw it happen with the Beta...